<nav id="top-nav" class="top-nav clearfix animated fadeInDown">
  <h1><a href="#hero">Buttons</a></h1>

  <ul class="top-nav-links"></ul>

  <span class="button-dropdown" data-buttons="dropdown">
    <button class="button button-plain button">Menu</button>
    <ul class="button-dropdown-list is-below">
    </ul>
  </span>
</nav>